package cn.itcast.security;

import cn.itcast.pojo.Permission;
import cn.itcast.pojo.Role;
import cn.itcast.pojo.User;
import cn.itcast.service.UserService;
import com.alibaba.dubbo.config.annotation.Reference;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;
import org.springframework.util.ObjectUtils;


import java.util.ArrayList;
import java.util.List;
import java.util.Set;


@Component
public class HealthUserService implements UserDetailsService{
    @Reference
    private UserService userService;

    //根据用户名查询用户信息
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        //远程调用用户服务，根据用户名查询用户信息
       User user = userService.findByUsername(username);
        if (ObjectUtils.isEmpty(user)) {
            //用户名不存在
            return null;
        }
        List<GrantedAuthority> list = new ArrayList<>();
       Set<Role> roles = user.getRoles();

        for (Role role : roles) {
          Set<Permission> permissions =  role.getPermissions();
            for (Permission permission : permissions) {
                //授权
                list.add(new SimpleGrantedAuthority(permission.getKeyword()));
            }
        }
        return new org.springframework.security.core.userdetails.User(username, user.getPassword(), list);
        //org.springframework.security.core.userdetails.User user1 = new org.springframework.security.core.userdetails.User(username, user.getPassword(), list);
    }
}
